To clean a fuel injector properly you will need to have the right equipment which can be expensive. The Fuel Injector Cleaning System requires the vehicles fuel pump be disabled and uses a stand alone fuel/cleaner agent that allows the engine to run for in car injector cleaning. In most cases this makes a noticeable change in cars with over 120,000 miles on them. For out of vehicle injector cleaning advance equipment is needed. As you can see in the video the equipment can be sufficient but not cost effective for just one vehicle.